High resistivity materials are used in_____________?

Related Mcqs:

1. Low resistivity materials are used in__________?

   A. transformer, motor and generator windings B. transmission and distribution lines C. house wiring D. all above applications...

2. On which of the following factors does the resistivity of a material depend ?

   A. Resistance of the conductor B. Area of the conductor section C. Length of the conductor D. All of the above...

3. By increasing impurity content in the metal alloy the residual resistivity always_____________?

   A. decreases B. increases C. remains constant D. becomes temperature independent...

4. Which of the following affect greatly the resistivity of electrical conductors ?

   A. Composition B. Pressure C. Size D. Temperature...

5. Addition of 0.3 to 4.5% silicon to iron ________ the electrical resistivity of iron?

   A. increases B. decreases C. does not change...

6. The resistivity of a metal is a function of temperature because_____________?

   A. the amplitude of vibration of the atoms varies with temperature B. the electron density varies with temperature C. the electron gas density varies with temperature...

7. Which of the following factors affect resistivity of metals ?

   A. Age hardening B. Alloying C. Temperature D. Cold work E. All of the above...

8. Which of the following high resistance materials has the highest operating temperature ?

   A. Kanthal B. Manganin C. Nichrome D. Eureka...

9. Platinum is used in_____________?

   A. electrical contacts B. thermocouple C. heating element in high temperature furnace D. grids of special purpose vacuum tubes E. all of the above...

10. Spark plug makes use of which of the following materials for insulation ?

    A. Porcelain B. Slate C. Asbestos D. Glass...